Transfer-table stop mechanism



July 28,1925,

8. D. s'rlzy Ns TRANSFER TABLE STOP mEcnAmsfil Filed April 22- I932 2 Sheets-Sheet 1 July 28, 1925.

1,547,626 B.-.D. STEVENS TRANSFER TABLE STOP MECHANISM 2 Sheets-$11062 Filed April 22. 1922 Patented July 28, 192 5.

UNITED STATES FFICE'.

ATEN'P BURT D. STEVENS, F EVANS'ION, ILLINOIS, ASSIGNUR TO MIEIILE PRINTING PRESS 8t MAI TUFACTUE-ING COMPANY, OF CHICAGO, ILLINOIS, A CORPOBATIQN OF ILLI- NOIS.

TRANSFER-TABLE STOP IVIECHANISIVI.

Application filed. April 22, 1922. Serial No. 555,849.

To aZZ 0.071 am it may concern:

Be it known that I, Bun'r D. STEVENS, a citizen of the United States, residing at Evanston, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Transfer-Table and held in its stopped forward p0siti0n for maintaining a front register relationship with respect to the cylinder.

Another object is to provide means where- -by a transfer table is positively held against lateral movement with respect to the cylinder.

Another object is to insure both sides of the transfer table moving into a predetermined forward position with respect to the cylinder in a manner to meet the various re quirements for successful commercial use.

These and other objects are accomplished by. means of the arrangement disclosed on the accompanying sheets of drawings, in which Figure 1 is a fragmentary side elevation of a printing press embodying my invention, the cylinder and transfer table being shown in a plurality of different positions;

Figure 2 is an enlarged detail elevational view showing the transfer table in one of its limiting positions and in the position which it occupies as a sheet of material is being front registered with respect to the cylinder grippers; and

Figure 3 is a fragmentary top plan, view of the printing press, parts being broken away to show cooperating parts of the mechanism included in my invention.

The various novel features of the invention will be apparent from the following description and drawings, and will be particularly pointed out in the appended claims.

Referring to the figures of the drawings, it will be noted that this invention is disclosed in connection with a vertical type of printing press having a main frame upon which is mounted a way-frame 11 in which the type bed, not shown, is vertically reciprocally mounted. Also vertically reciprocally mounted in the way-frame is the cylinder frame 12 carrying the cylinder 13. A transfer table 14 which guides the fed sheet material to the cylinder is pivotally mounted on the cylinder frame 12. More specifically, there is mounted in the cylinder frame a rock shaft 15 to opposite ends of which arms 16 are secured, the upper ends of which arms are rigidly connected to the transfer table 14 for supporting the latter. The lower end of each of the arms 16 is pivotally connected at 17 to a rod 18 which slidably receives a block 19 which is pivotally mounted in the upper end of an arm 20 secured to a rock shaft 21.

Thus far the mechanism described is the same at each end of the cylinder. However, for giving the transfer table its dipping movement for front registering, as shown in Figure 2, and in full lines in Figure l, a cam race 22 is provided in a cylinder actuat ing-gear member 23. Movably mounted in this cam race 22 is a roller 24 which is mounted in the upper end of an arm 25 formed integrally with the arm 20 at one side of the machine. It will be appreciated that as the gear 23 is rotated in a clockwise direction, as viewed in Figures 1 and 2, the roller 24: will move radially inwardly as a r sult of the spiral cam race 22, thereby rocking the shaft 21 in a clockwise direction for moving the transfer table 14 from an inclined position, as shown in full lines in Figure 1 to the dotted line position shown in Figure 1. Upon a reversal of movement of the gear 23 the roller 24 will move radially outwardly, thereby yieldably press ing the upper part of each arm 16 forwardly, the action being yieldable because of the fact that the motion is transmitted to said arms 16 through the blocks 19 and coiled springs 18. In this connection it will be noted that the arms 16 in each instance is provided with a tongue 26 which passes forwardly into an associated groove 2? of a stop member 28 for limiting the forward and dipping movement of the transfer table. Each side arm 16 is driven through a separate connection including an arm 20, block 19 and spring 18, so that if, for example, the right-hand tongue 26, as shown in Figure 3, should pass into engagement with its stop member in advance of the left-hand tongue member, there would be no cramping action at the right-hand stop member as the lefthand tongue 26 moved further and into engagement with its stop member. Furthermore, the spring and slide block arrangement permits the arms 16 being moved forwardly through the spring in a yieldable manner and such that the excess throw which is provided for by the cam 22 is absorbed by the springs 18. Accordingly, the tongues 26 are yieldably held in engagement with the front portions of the stopvmembers 28 for maintaining the transfer table 1 1 in proper position during the front registering of a sheet with respect to the cylinder. Furthermore, the tongues 26 engage the grooves 27 of the stop member in a manner to prevent any lateral movcment ofthe transfer table with respect to the cylinder. As a result thereof a sheet fed from the transfer table to the cylinder is accurately positioned and registered with respect to said cylinder without any variation being permittedfand at the same time cramping of the part s'is entirely obviated.

It is my intention spirit and scope of the following claims.

1 claim: p 1. In a printing press, the combination of a cylinder frame, a transfer table carried by said cylinder frame and having "a IGlZLtIVG movement with respect thereto for front register purposes, and means for limiting the extent of relative movement between said transfer table and said cylinder frame for registering purposes and for preventing relative lateral movement therehetween.

2. In aprinting press, the combination of a movably mounted cylinder frame, a transfer table carried thereby, means for giving said transfer table a movement with r spect to said cylinder frame forregistering purposes, said cylinder frame and table having cooperating means for limiting the relative movement between said cylinder frame and transfer table. I

3. In a printing press, the combination of a movably mounted cylinder frame, arms pivotally connected thereto, a transfer table to cover all modificzv tions of the invention falling with n the of a cylinder frame having a slot therein, an arm pivotally connected to said cylinder frame, a transfer table connected to said arm, means for giving said transfer table a registering movement, said arm having a projection for extending into said slot for limiting the registering movement of said transfer table and for preventing lateral movement of said transfer table with respect to said cylinder frame.

6. In a printing press, the combination of a cylinder frame having a slot therein, an arm pivotally connected to said cylinder frame, a transfer table connected to said arm, means for giving said transfer table a registering movement, said arm having a projection for extending into said slotfor limiting the registering movement of said transfer table and for' preventing lateral movement ofsaid transfer table with respect to said cylinder frame, and yieldable means through which said'transfer table is actuated whereby any excess ve movement 1S ab-' sorbed.

7. Ina printing press, the combination of a cylinder frame, arms pivotally connected thereto at opposite sides thereof, a transfer tablecarried by said arms, and means whereby motion is transmitted to said arms for giving said transfer table a given movement and whereby excess motion tending to move the transfer table beyond a predetermined point is absorbed.

8. In a printing press, the combination of a cylinder frame, a cylinder actuating gear carried in said frame and having a cam race therein, arms pivoted to said cylinder frame,

a t ansfer table carried by said arms, and an,

operativeconnection between said cam'race andarms whereby the transfer table is yieldablyjmoved in a given direction and whereby any movement tending to move the transfer table beyond a certain predetermined point is absorbed 9. In a printing press, the combination of a cylinder frame, a cylinderactuating gear carried in said frame and having a cam race therein, arms pivotedto said cylinder frame, a transfer table carried by said arms, and an operative connection between said cam race and arms whereby the transfer table is yieldably moved in a given direction and whereby any movement tending to move the transfer table beyond a certain predetermined point is absorbed, said arms and cylinder frame having cooperating stop portions for-limiting the movement of said transfer table in its movement in one direction and for preventing lateral movement of said transfer table relative to said cylinder frame.

Signedat ClllCttgO,lll1n01S, this 17th day of April, 1922.

Y BURTD. STEVENS. 

